Safety device.



H. G. ANDERSON.

SAFETY DEVICE.

APPLICATION FILED APILZB, 1911.

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H. C. ANDERSON.

SAFETY DEVICE.

APPLICATION FILED APR.28, 1911.

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prnrnn STATES: PATENT OFFICE.

HENRY c. ANDERSON, OF'CHICAGO, ILLINoIs.

SAFETY DEVICE.

Specification of Letters Pat ent.

Patented Oct. 13, 1914.

Application filed April 28, 1911. Serial No. 623,902.

To all whom it may concern; I

' Be it known that I, HENRY C. ANDERSON, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Safety Devices, of which the following is a full, clear, concise, and eXact description, reference being had to the accompanying drawings, forming a part of this specification.

, My invention relates tosafety devices for elevators and more particularly to that type of device which grasps the guide rails upon means from the guide rails and places the same in conditionifor use again. The device referred to is of that character that engages both guide rails at the same timeand consequently both gripping means are compelled to work in synchronism. This feature in accordance with my invention may be ac complished in adiversity of ways, but in the specific embodiment herein shown, is

' accomplished by bothgripping members being connected together by virtue of a con-l necting shaft which has rigidly secured to it an arm which is secured to a governor rope or cable. v This governor rope or. cable is connected to a clutch which is brought to a stop when too high a speed is attained by said elevator or car, thereby operating said gripping mechanism to engage the guide rails. v

The construction of my inventionis such that the weight of the load carried by the car does not deter the operation of my device but adds to the efficiency of the same by reason of the fact that as the mechanism is brought into operation, the weight of said car is transferred directly upon said gripping means.

My invention further contemplates such a construction that the parts do not need to be made unduly heavy as the weight is dis tributed in such a way that breaking is not almost impossible, y c r I will describe my invention more in detail by reference to theaccompanying drawings, in which:

at all likely to occur, in fact it is rendered I f Figure 1 is aside elevation of a car showing my invention attached thereto and the means which govern same; Fig. .2is an enlarged, detailed end elevation; Fig. 3 is a changed end position ofmy inventionshow- Y ing my 'device clutching the guide rails; F 1g, & is a front elevation of my device showing it connected to the under frame of a car; Fig. 5 is a section on line aa of Fig;

4, and Fig. 6 is asection on line 6-6 of Fig. 2.

In the specific form shown in the accompanying drawing, Ishow a car 1 which slides upon the, usual guide rails, 2 and is raised and loweredby means of thecables 3.

My device i is shown herein as attached to theunderside of the car 1 and has progectingfrom it an, arm 5whichengages, or

which is rigidlyattached' tothegovernor cable 6' o f-the governor 7. Said governor is for thepurpose of actuating the safety device whentoo high a speed is attained by the car to insure safety. to the occupants. The governor of course may be of; any suitableconstruction, the one herein shown having centrifugally controlled elements which when thrown outwardly stop the wheel 7 this; stopping tending to hold the 311115. The lower extremity of the cable 6 runs around a weighted pulley so that there will be a certain amountiof give and not. too suddenlastoppage of the parts after the governor, has acted. It willbe evident by referring'to the drawings that as the car descends too rapidly for safety, the clutch. becomes operative, therebyexerting apull upon the arm 5 in. an upwardly direction, thereby causing the aws 8 and 9- to grasp the guide rails. This operation is brought about by the fact that the jaws 8 and 9 are pivotally mountedon a shaft 10 which through the interposition of the sleeve 26 is 'associate'dwith an arm 11 which bears upon a lug orprojection 12 which is integral with the'casting 13 secured to the under side of thecar. f It will be seen that as the lever 5 is pulled upwardly, the arm l lis brought into engagement with the lug 12, thereby causing the sleeve 26 to be rotated, and thereby causing pairs have been made.

the shaft 10 to be raised in slot 25 against spring 24, whereby the jaws S and 9 which are of a tong-like construction grasp the rails 2. These jaws S and 9 are constructed in such a manner as to form the clamping or biting members let and 15 which have their inner faces provided with teeth as shown more clearly in Fig. 6, and are also provided wit-lithe shoes 16 and 17 which are for the purpose of limiting the distance which the members 14: and 15 are allowed to enter the rails 2. This construction I find very eiiicient in accomplishing my object of not marring the side or guide rails to such an extent as to render them useless for further service. The jaws 14 and 15 are further provided with outwardly extending arms 18 and 19 which ride in slots 21 and 20 in downwardly projecting arms 22 and 23 of the casing 13 which is secured to the under side of the car. It will be seen that as the car descends too rapidly, the arm 5 is pulled up and the jaws 8 and 9 brought'into engagement with the rails 2 that the weight of the car then is transferred to the casting 18 and brought to bear directly upon the arms 18 and 19 as shown in Fig. 3 and thereby hold the car safely until the necessary re- It will further be seen that when said repairs have been made all that is necessary to bring the car into operating position again is to raise same slightly, thereby removing the weight of the car from the arms 8 and 9, at which time the spring 24 which is housed in the casting 13 bearing directly upon the shaft 10 exerts a downward pressure, thereby opening the jaws 14c, 15, 16 and 17 from the rails 2.

The arm 5 is securely fastened to a sleeve 26 which carries within it the shaft 10 and has mounted at opposite ends the levers 27 and 11 which bear upon the projections 12 of the castings 13. This sleeve 26 has a dual purpose, one of which is to cause the jaws 8 and 9 which grasp the guide rails 2 to operate in synchronism and the other purpose is to form an extensible means for connecting said clamping jaws, as it is often found that the distance between the rails in an elevator shaft varies slightly. The casting 13 is also provided atits upper extremity with the channel shaped member 28 which forms a housing for the rails 2. The dogs are loosely mounted with respect to the sleeve 26 so that they are automatically adjustable to the rails 2.

While I have herein shown and particularly described the preferred embodiment of my invention, I do not mean to limit myself to the precise construction and arrangement as herein set forth, but

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. Apparatus of the character described comprising an elevator car, guides for said car, safety devices adapted for engaging the opposite sides of each of said guides, means controlled by the speed of the car for actuating said safety devices to engage the guides, said safety devices being rotatably mounted upon and adjustably associated with said means to thereby accommodate for varying distances between the guides.

2. An apparatus of the character described comprising an elevator car, a guide therefor, and safety devices adapted to engage the guide when the car reaches an undue speed, said safety devices including guide engaging jaws and additional jaws for limiting the distance said first aforesaid jaws may enter said guide.

3. A. safety device for elevators comprising a guide, jaws normally not in engagement with the elevator guide, and means operable upon undue increase in'speed of the elevator for bringing said jaws into engagement with the guide, said means including a lever, a shaft carrying said jaws, and means for raising said shaft and jaws into engagement with the guide, said second mentioned means including a stationary member adapted to engage one end of said lever. I

4:. A safety device for elevators comprising a guide, jaws normally not in engagement with the elevator guide,-means operable upon undue increase of speed of the elevator for bringing said jaws into engagement with the guide, said means comprising a lever and a shaft carrying said jaws and a spring for releasing said jaws.

5. Apparatus of the character described including an elevator car, a pair of guides therefor, safety jaws for said car for each guide, and governor controlled means for causing simultaneous engagement of the jaws with both of the guides aforesaid, said means comprising longitudinally extending means carrying said jaws, a lever secured thereto to operate said means, stationary members and projections carried by said means to engage said stationary members to cause simultaneous engagement of the jaws with both of the guides aforesaid.

6. Apparatus of the character described including an elevator car, a pair of guides therefor, safety jaws for said car for each guide, and governor controlled means for causing simultaneous engagement of the jaws with both of theguides aforesaid, and means comprising longitudinally extending means carrying said jaws, a lever secured thereto to operate said means, stationary members and projections carried by said means to engage said stationary members to cause simultaneous engagement of the jaws with both of the guides aforesaid,and means for simultaneously disengaging said jaws when the car has been repaired, said means comprising a spring acting upon said jaws. a

7. A safety device for elevators comprising a guide rail, a single pivoted member, a jaw provided on said member to engage said guide rail, and having a second jaw mounted thereon for regulating the distance that said member is allowed to enter the rail, and means for actuating said jaw when undue increases of speed by the car is attained.

S. A safety device for elevators comprising a guide rail, an individual pivoted element mounted at each end of a connecting member, the connecting member aforesaid, a jaw provided upon each of the aforesaid elements to engage said guide rail, and having an additional jaw mounted thereon adapted for regulating the distance that said jaw is allowed to enter the rail, and means for actuating said connecting mem- 1 her to actuate said jaws.

9. Asafety device for elevators comprising guides, jaws normally not in engagement with the elevator guides, there being a pair of jaws for each guide, means operable upon therefor, a safety device mounted on said car consisting of a pair of tongs to engage the guide, said tongs being laid loosely in,

the car framework, and means controlled by the speed of said car for actuating said tongs.

In witness whereof, I hereunto subscribe my name this 11th day of April, A. D. 1911.

HENRY C. ANDERSON. Witnesses:

A. LYDA JoNEs,

HAZEL JONES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

, Washington, D. G. 

